Cylinder hone



June 22, 1948. E. D. WILKERSON 2,443,941

CYLINDER HONE Filed March 25, 1946 INVENTOR.

EDWARD 0. W/LKERSON I BY I ATTORNEY Patented June 22, 1 948 UNITED STATES PTENT OFFICE,

CYLINDER HQNE Edward D. Wilkerson, Orange, N. J.

Application March 25, 1946, Serial No. 656,960

The invention relates generally to hone structures and primarily seeks to provide a novel cylinder hone which is simple in construction and can be manufactured at low cost, and in which the cylinder wall engaging stones are mounted in a novel manner enabling them to readily conform to and efliciently hone cylinder surfaces which are not entirely true and uniform.

Cylinder honing devices are known in which there are included a shaft insertable axially into a cylinder, and cylinder wall honing elements carried by the shaft and effective as the shaft is rotated to engage and hone the cylinder walls.

In some of these known devices the honing elements are sWingably mounted at longitudinally spaced points on a rigid carrying shaft, and in such devices it is impossible for the honing elements to conform to cylinder wall surfaces engaged thereby and which are not true and uniform. This is due to the fact that the rigid shaft mounting causes the swinging honing elements 6 Claims; (Cl. 51-1842) always to remain in parallel relation to the axis of the rigid shaft. Therefore, it is an object of the present invention to provide a novel cylinder honing device in which the honing head including the honing elements and the swingable mountings therefor is so constructed as to be capable of flexing in two planes, one along and one across the axis of the head, thereby to permit the honing elements to properly engage in honing contact with cylinder walls that are not true and uniform.

An object of the invention is to provide a honing device of the character stated including a shaft insertable axially into a cylinder to be honed and having longitudinally spaced thereon two support members, and a plurality of honing elements swingably mounted on the support members and adapted to engage and hone cylinder wall surfaces as the shaft is rotated, said shaft having a flexible section between the longitudinally spaced support members capable of flexing about and along its axis in a manner for enabling the honing elements to conform to cylinder wall surfaces that are not true and uniform.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a side elevation illustrating a hone structure embodying the invention, parts being broken away and in section.

Figure 2 is a vertical cross section taken on the line 2-2 on Figure 1.

Figure 3 is a somewhat diagrammatic vertical sectional view illustrating the improved hone structure in the process of honing a cylinder wall which is slightly tapered the arm engaging springs and the spring covering cap being omitted for purposes of clarity.

Figure 4 is a view similar to Figure 3 illustrating the manner in which rigidly mounted honing elements engage a slightly tapered cylinder wall.

In the example of embodiment of the invention herein disclosed, the improved hone structure includes a flexible shaft 5 having a head 6 brazed or otherwise secured on one end extremity thereof, and a driver head i brazed or otherwise secured on the other end extremity thereof.

The head 6 has an end face 8 forming part of a sphere, and its upper face 9 is disposed perpendicular of the axis of the shaft. Three pins ill project from the face 9 in equidistantly spaced relation and with their axes paralleling the axis of the shaft 5.

Spaced a distance above the head face 9 is a disk I I, said disk being brazed or otherwise secured to the shaft 5. If desired, the edges of the disk may be cut away or notched in the manner clearly illustrated in Figure 2, and three pins 12 project from said disk toward the driving head I, or in other words in the same direction of projection as the pins l0 and in axial alignment with said pins.

Three U-shaped stone carriers generallydesignated I3 are provided and each thereof comprises a U-b ase l4 and two arms l5, the latter being disposed perpendicular to the axis of the shaft 5, and the base M being disposed in parallel rela tion to the axis of said shaft. Each carrier member base I4 includes a channel or groove l6 ex,

tending throughout the major portion of its length between the arms l5, and in each channel is secured a honing stone ll. It will be apparent by reference to Figure 2 of the drawings that the outwardly projected portion of each honing stone is convexly curved as at I8 and projects slightly beyond the edge portions of the channel in which it is mounted. a

Each carrier arm I5 is provided with an aperture 19 to fulcrum on one of the pins ill or 2, and inwardly of each said aperture, each arm disposed to overlie the plate H is equipped with a headed stud 20. A retractile spring 21 is connected at its ends to each adjacent pair of the arm studs 20, and it will be apparent by reference to Figure 2 that the springs constantly tend to force the stones ll outwardly.

A cap 22 is slidable along the shaft 5 and is recessed as at 23 at the end thereof disposed toward In the use of the improved honing device, the operator grips the honing elements so as to contract them against the action of the springs 2! and insertsthehomng head axially into the cylinder to be honed; The driving head l'isschucked in= a suitable driving device (not shown) and rotation is imparted to the head to cause the same to rotate in the cylinder with the honing stones 11* rapidly dragging over the surface to be honedx: It will be obvious that the action of the springs 10 2! and also centrifugal force will hold thehoni-nge stones against the cylinder wall.v

Should the device be employed in the honing of a cylinder wall surface not entirely trueaand. uniform, the flexible section of the shaft extending between the headband the plate-cl i-isifree-w I to flex about, and also along its axis in order to permit the honing stones to accurately-conform to and properlyengage the cylinderwalll- In :this in-z, stance, the springs 2i urge the :stonesaga-inst the. smallest'diameter 25 of ,thescylinder26-,-and :then by the combined .action .of the springs. and pen-r trifugal force the shaft5= flexes'and'gtwistsslightlyv between'the head.-6:and the plate Il,..andrin so;

relatively andallowthe "carriers to properly align. 1 the stones'against ,thee'cylinder wall surfaces being. honed.

It will be apparentyby referenceto Figure 4 thatv 29 be-employedin the-honingof a slightly-tapered, cylinder Wall, ;.-the.stnes-: filhwouldrcontact thecylinder wall properly only at the small diameter. end and would be slightlylspaced -fromvthe wall'at the other end as at3l.

While oneform of the invention has-been shown for purposes of illustration,- itis to be-clearlypune derstood-that various changes inthe-rdetailseof,. construction" and: arrangement of parts: maybe made withoutdeparting from .the spiritlandscope of theinvention as defined in ,the appended.- claims.

I claim:

1. A cylinder honing,deviceeincludi-ng,a shaft. insertable axially into: acylinder-to be honednandhaving longitudinallyspacedthereon two support,- members, and a pluralityof honing elements sup; ported for outwardand inward movementon saidl. support members and adaptedto engage and.hone,.. cylindepwall surfaces as..the.-shaft,is rotated,.said. shaft having. a flexible section .betweenthe- 1011",. gitudinallyspaoed support, members. capable. of flexing about .and along its axisin .a mannenform enabling. the honing elements .toconform to cyline, derwall surfaces that are not true and uniform.

2. A cylinder honing device includingia .shaft insertable axially into a cylinder to be honedand havinglongitudinally spaced thereon ,two support members,- anda pluralityof honing elements sup: ported for outward andjinward movementton said. g support members and adaptedjto engage and hone cylinder wall surfaces as theshaft isrotated, said" shaft being flexible from endto end including that portion between the longitudinally spaced support members capable of flexing aboutiandjalong its axis between said support members in a manner for enabling. the honing element s:;to1 conform' to cylinder wall surfacesthatarenottrueand uniform."

3. A cylinder honing device including a" shafti insertable axially intoa cylinder to e honed 'and' havinglongitudinally spaced thereontwo support members; a plurality of -hon-ing- "elements-' swingably mounted on said support members and adapted to engage and hone cylinder wall surfaces as the shaft is rotated, said elements including U-shaped carriers havingarms iulcrumed on 5 pins projecting iinIlike directiomfromwboth support members and paralleling the axis of the shaft, and a cap slidable along said shaft and removably secured thereon in position for retaining theircarrier arms on said pins.

4. A honing device as defined in claim 1 in whichthe honing elements include U-shaped carriersthaving armszfulcrumed on pins projecting in like direction from both support members and' paralleling the axis of the shaft, and in which there is included a cap slidable along the shaft and removablyvsecured: thereon in position for retaininggthe carrier arms on thepins;

5. A cylinder honing device including;,a-shaftr insertable axially into a-cylinder toberhoned andhaving longitudinally spaced. thereon two-sup:-

port members, a pluralityof honing: elements swingably; mounted. on said 1 support ;members and: adapted to engage and hone -cylinder -wall sur faces asthe shaft is rotated, said elements includ-t do permitstheheadfisandthe-plate l l to movei ing U-shaped "carriersxhavin c arms 5 fulcrumedr' on pins projecting in-like direction-from. both support I membersrand paralleling the: axiszof the shaft; the arm at one end ofeach :saidcarriers,

arm: also having astud projecting therefrom: v should a honing head-having -r s ft mgg inward1y-0f its fulcrum retractile springs: con-=-- nected -to adjacent-pairs; of studs and constantly? tending toforce the honing; elements:- out-a1 wardly, and a :cap slidable along: said shaft. and -removably secured thereon inposition for;-

35, retaining. the carrier *arms on-rsaid pins and have" ing a recess therein disposed to housenthe springsn;

6. A cylinder honing device including; a shaft: insertable axially intoa cylinder to behoned and. having r longitudinally spaced 1 thereon: two;-

import members; aiplurality of 'honing-1 ele'rnentsn;

swingably mountedzon: said support *membersfand adapted to-engage and hone cylindertwall surfaces: as -the shaft is rotated,::said: elements including 2 U -sh-aped-. carriers having-z arms-i fulcrumed-z onpins --projecting;in like directionifromi-both" support members and paralleling the axis of 2 the shaft, the arm at one end of each saidtrrcarrier arm also having -astudrprojectin'g.therefrom. inwardlyofitsful'crum; retractile springsconnectedr to adjacent pairs of studs and"constantly' tending to :force the honing elements "outwardly; and' a cap slidable along saidshaft'and remo-vably' se cured thereon in position for "retaining the car-- rier arms onsaid pins and' having arecess therein 1 disposedto 'house'the springs, said shaft having a flexible section betw'een: the longitudinally spaced supportmembers =capabie of jflex'in g about" and, :along- :its axis 5 in :a; manner "for". enabling the. honing elements-teconform to cylinder: wall sur= I 0 faces that are not-trueand uniform. 1.

EDWARD. D. 'WI-LKERSONL REEERENCES..CITED The following references are'of record in the file'of this patent:

UNITED' STATES PATENTS."

Number Prange May 7, 1935-" 

